Peters



(No Model.) 2 Sheets-Sheet 1.

C. T. SCHOEN.

GAR SPRING.

No. 378,264. Patented Peb. 2l, 1888.

l w lll/161 (No Model.) 2 Sheets-Sheet 2.

G. T. SGHOEN.

GAR SPRING.

No, 378,264. l Patented Feb. 2l, 1888.

VfG/.55.

`\\\vl\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\N\\\\\\\\\\\\\\\\\\N\\\\Ww NV PETERS Fhow-Limugnpmr, wnshingam D. D,

` UNrreD STATES Partnr rrrcn.

CHARLES T. SCIIOEN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE CHARLES SCOTT SPRING COMPANY, OF SAME PLACE.

CAR=SPRING.

SPECIFICATION forming part of Letters Patent No. 378,264, dated February 2l, 1888.

(Xo model.)

.To all zctom it may concern:

Be it known that l, CHARLES T. Sonoran, a resident of Philadelphia, Pennsylvania, and a citizen of the United States, have invented certain Improvements in Car-Springs, of which the following is a specilication.

M y invention relates to that class of car' springsin which the plates are made oi' wrought metal.

Heretofore in the construction of these w1c'ught-1netal carspring plates it has always been necessaryto employin connection with one ofthe plates a separate deep sock et, in order to allow for the free movement of the connect-ing bolt or bolts on compression of the springs, as shown, forinstance, in Fig. l() of the drawings of Letters Patent No. 368,428, dated August 18, i887, granted for my improvements in carsprings. The construction of car-springs having wrought-metal plates with the separate sockets is, however, lacking in economy andin strength and security of the car-springs. I have found that these separate sockets can be dispensed with and their accompanying objections overcome by punching, drawing, or forcing up deep recesses or sockets in the bodies of both top and bottoni plates, which recesses jointly are of sufficient depth to permit the desired full movement of the coniining bolts. Hcretofore it has been customary to forni in one ol` the wrought-metal plates shallow re cesscs sufficient merely for the reception of the bolt-heads or nuts on the bolts; but the formation of recesses in the spring-plates themselves of suilicicnt depth for the fullplay of the bolts has heretofore been considered an impossibility and the objectionable separate sockets considered a necessity.

In the accompanying drawings, Figure l is vertical section of a car-spring constructed in accordance with my invention. Fig. 2 is a plan View of the saine, and Fig. 3 is a plan view of a car-spring of a modified form. Figs. 4 to 9, inclusive, are views illustrating successive steps in the formation cfa car-spring plate in accordance with my invention.

In Figs. l and 2 I have illustrated a carspring of the character known as a graduated car-spring, there being two end spirals, B B, pressing against and confined between the top aud bottom plates, A and A', with an intermediate spiral, B', of larger diameter occupying the space between the end spirals andconlined in position by the llanged edges a ot' the top and bottom plates, but not pressi ng against the said top plate until the load ou the carspring is such as to compress the end spirals, B B, to a certain extent.

In Fig. 3 I have illustrated in plan View a modied form of car-spring in which three spirals are to be used, as will be readily understood without detailed explanation. I do not, however, wish to confine myself to either of these particular shapes or styles of car-springs, as my invention may be applied to various constructions of car-springs in which the spirals are confined between top and bottom platcsof wrought metal.

I) D are the confining-bolts, which hold the top and bottoni plates, A A', together, each bolt having at one end a suitable head, d, and at the other end a nut, d. In order to allow space not only for these heads and nuts, but also for the free play ofthe bolts as the springs are compressed, I forni in the top as well as the bottoni plates deep sockets or recesses E, the recesses in each plate being of a sufficient depth to allow for the head or nut of each bolt, and also for one-half ol1 the movement due to complete compression of the springs under load.

In order to punch, press up, draw, or otherwise forni these sockets the more readily without injury to the metal of which the plate is made, I make the walls of the sockets of the curved form illustrated in Figi. Furthermore, since each plate has its sockets formed of a depth to allow for one-half of the movement due to compression of the springs, both top and bottoni plates may be made precisely alike, and therefore only one set ofdies will be needed for their formation, whereas car-springs with wrought-metal plates and separate sockets require separate sets of dies for the top and bottom plates.

At the same time that the sockets E E as well as the flange a are formed on cach plate and by the same dies I prefer to draw, punch, or press up to the outer side of the plate projecting teats F, to be adapted to corresponding re- IOO cesses in the wood or iron work of the carto hold the car-spring boxes in position. 4

In pressing up car-spring plates in accordance with myinventon it is necessary to effect the formation of the deep sockets by a series of operations, in order to prevent excessive strain upon the plates. Thus, as shown in Figs. 4 to 9, the blank is first punched out, as shown in Figs. 4 and 5, the rstpressing operation effecting the formation ofthe lugs F and striking up large and comparatively shallow pockets from the plate, as shown, in Figs. 6 and 7, while the second operation effects the v Hanging of the edges of the plate, the deepening of the sockets, land the contraction of the upper portions or mouths of the same.

I claim as my invention- 1. Acarspring having wrought-metal plates with deep sockets drawn or pressed up out of the bodies of the plates of a depth to allow for the full movement of the bolts on compression of the springs under load, substantially as set forth.

I 2. A car-spring having its. top and bottom plates of wrought metal precisely alike, with deep sockets drawn or pressed up out of the body of the metal, the sockets in both plates beingjointly of a depth to allow the full movement of the bolts on compression of the springs under load, substantially as described.

3. A car-spring plate of wrought metal having deep sockets pressed or drawn up out of the body of the metal, with their walls of a curved shape, substantially as and for the purpose described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHAS. T. SGHOEN.

Witnesses:

JOHN T. LEWIS, HARRY SMITH. 

